ETSI EG 201 066-1
ETSI EG 201 066-1
Integrated Services Digital Network (ISDN); Digital Subscriber Signalling System No. one (DSS1) protocol; Application of the Bearer Capability (BC), High Layer Compatibility (HLC) and Low Layer Compatibility (LLC) information elements; Part 1: Test Suite Structure and Test Purposes (TSS&TP) specific
standard published 04/01/1999 by European Telecommunications Standards Institute